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Proceedings Paper

Infrared spectroscopy of laser-irradiated dental hard tissues using the Advanced Light Source
Author(s): Daniel Fried; Thomas Breunig
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Paper Abstract

FTIR spectroscopy used in the specular reflectance mode is well suited for resolving thermally induced changes in dental hard tissue as a result of laser irradiation. High spatial resolution is achievable with a high brightness synchrotron radiation source such as the ALS at Lawrence Berkeley National Laboratory. IR spectra of modified enamel were acquired after laser ablation using several laser wavelengths from the UV to the mid-IR. Specific areas of laser ablation craters were probed non-destructively with 10-micrometers spatial resolution. The chemical composition of the crater walls deviates markedly from that of hydroxyapatite after Er:YAG and CO2 laser irradiation without added water. New mineral phases were resolved that have not been previously observed using conventional IR spectroscopy.

Paper Details

Date Published: 27 April 2001
PDF: 5 pages
Proc. SPIE 4249, Lasers in Dentistry VII, (27 April 2001); doi: 10.1117/12.424501
Show Author Affiliations
Daniel Fried, Univ. of California/San Francisco (United States)
Thomas Breunig, Univ. of California/San Francisco (United States)

Published in SPIE Proceedings Vol. 4249:
Lasers in Dentistry VII
Peter Rechmann D.D.S.; Daniel Fried; Thomas Hennig, Editor(s)

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